One successful trial is allowed per eligible permanent email and per IP/network in total. Waiting does not reset that limit; temporary, disposable, and unreachable mail domains are rejected, and daily capacity applies.
Your browser combines user agent, language, platform, processor count, device memory, screen dimensions, color depth, and canvas rendering into a one-way SHA-256 fingerprint. Only the resulting hash is sent; the individual values and canvas image are not sent separately.
The email domain—not the mailbox name—may be checked by our configured fraud-classification provider. Read the full privacy disclosure.